Good Riddles

Question: One stroke is not enough to deal damage but combined with many strokes, I am able to deal mass damage. What am I?

Question: Theres a good barbor and theres a bad barbor, The good barbor has a bad haircut and the bad barbor has a good haircut. Why is that...?

Question: What has four eyes but can't see?

Question: Name 4 ways to calculate 1+1.

Question: A girl went to school, and her teacher asked her how old she was. Girl: I don't know, but I know I'm half my mother's age Teacher: how old is your mother Girl: I don't know, but she is 5 years younger than my dad Teacher: how old is your dad Girl: I don't know, but if you add all our ages, they count up to 100. How old is the girl, mother, and dad?